Combination gang sole-mold.



C. H. HILL.

COMBINATION GANG SOLE IYIOLI).

yCIM.

Il IIl m /m7 Lf;

rubber, or other like material, for'use on v arsenaal.:

OLE-MOLD?.

Application tiled April 13, 1914. Serial No. 831,663.

T0 all 'whom 'it may concern Be it known that I, CHARLES H. HILL, citizen of the UnitedStates ofv America, residing at Lynn, in the county of Essexand State of Massachusetts, have invented certain new and useful Improvements in -Coinbination Gang Sole-Molds,'of which the following is a specification, such as will enable others well versed'in the kart to which it appertains to make and use the same.

This invention relates tol improvements in molds used in the manufactureyof .soles of shoes or other footwear. ,s y, o u To fully understand the scope of my invention, one must first comprehendthe con- 'ditions under vwhich such soles have heretoforey beenmanufactured. That is to say, it

is customary for rubber manufacturers to use unit molds which are structurally weak owin' 'to anecessaryfnarrow marginal frame. Thls.`

weakness resultsin a greaty loss to manufac# turers from breakage of the molds caused by the pressure to which they'are vsubjected and which is necessarily .between which they are placed before the tov . repeated scarring and creasing of the steel 'pressure is applied thereto. In the repetition of use,.these plates become scarred and creased the edges or margins'of the-.unit molds, which scars and v'creases reproduce themselves on. lthe ,surface of the finished soles, detracting.v from their appearance and market value. Itisy alsoboth ditlicult and expensive .,to'secure aplurality of unit sole molds of an unvarying thickness, sothat, whennumerous` units vare used Vin the same press #and `between the same steel plates simultaneously, itisjimpossibleto give all 'the soles inthegmolds the same degree of pressureat thesame time. This lack of uniformity 1n pressure results in a further great loss to manufacturers from porous soles, and soles-not properly 'flowed and filled out.

The object'sof my invention are,1irst, .to'` lessen the breakagef-"of-.molds by insuring' eater strength.v- Second, to 'securea uni.- v

orm pressurezon the contentsof a.. plurality of molds between thesameaplates, so as toeliminate the/floss forming :faultyl soles by lack of equal pressure. Thlrd, to avoid the plates between which the Vsoles-are pressed, so as to, eliminate'the reproductlon of such scars and creases 'on lthellinislied product tion on the line 6 6 of applied to insure. a perfect product. These unitvmolds are,- used "in conjunction with plain steel plates 'these single molds Fourth, to provide an interchangeability of various parts so as to adapt the moldto produce varying thicknesses and styles .of-soles."

F ifth,to provide for the-.accurately placing of the suction back section and pins'which locate the nail holes and burs in the heel Specication of-Letters Patent. filmadkemillgedl 2,"ll9]l5. l i

portion of the sole, and further, to'secure' v other .advantages 'and results hereinafter referred to in connection with thed'escription,

of the varlous parts.

F1 gures land 2, represent a plan view and ,a. longitudinal'section respectively of a unit mold 'ordinarily used by rubber sole manufacturers. Fig-3. is a plan view of my imf proved gang mold plates removed. I Fig. 4, is a portion of a. bottom plate.

n o These -objectsare attamedby the means lllustrated in the accomlpanylng drawing, in which:

lates in' position, and Fig. 7,

Similar reference numerals in all the fig-l i ures of the drawing designate,like parts.;4 Molds of this character and frequently is rupturedor broken at the points indicated at 9 by the pressure applied -to the mold and because it lacks a reinforce.- ment.

As beforestated, it is almostimpossible and v ery expensive, to secure a plurality kof of unvarying thickness,

consequently the slightest difference in are Anecessarily f.- rovidefl with relatively narrow contour.v rames 8, which form the boundaries ofzth'e soles to be cast, and as clearly seen in Figs.- 1 and2, the boundaryframe around the 'heel lx1; y portion of the single molds is very slender,

height will cause an unequal pressureA in the different molds and notonly produce imperfeet or porous soles, but also scar and mark Y the pressure plate. To Vavoid. these difiiculties and disadvantages, my improved mold preferably comprises a plurality ofthe sin-` gle molds, each provided with its 'narrow border, margin, or contour lframe 8 secured together'V withaan integral webor depressed v portion l0 andarranged in reversed -posi" tion, that isgtheltoe portions of 'alternate molds being adjacent the'h'eel portions of lthe neXt .mold Arranged in this manner,

the preponderance of metal around the'com'- paratively narrow toe portions reinforces and strengthens the weak apertured heel portions likematerial, a mold that will lessen the cost of the adjacentforms.

A plural mold of this character will avoid the breaking o1 .the heel portions, as will happen in the, single molds, and can-be more easily constructed to provide an unvarying thickness topi-event the scarring of the plate i and the casting of imperfect or porous soles.

Each sole form ormold is provided with a through-aperture 11 which forms the heel,

' a depression 12`to form the'sole proper, and

a shallow portion 13 to'form the 'connection or shank between the heel and soleportio'ns. lTo furthe-r secure an 'even'pressure with a plurality of molds and to prevent the mar- .ring'of the pressure plates, theplural mold just .described is provided withy a relatively wide peripheral. frame 14, .thev same being formed of the same unvarying lthickness of the contour -frames 8 of the molds', thus when the pressureplates are applied, thisrelatively wide peripheral 'frame 4will limitand prevent any uneven pressure' upon the'contour frames 8.

Whenever it is desired to cast suction lor weight-reducing recesses inthe uppersurfaces of the heel portions and to form -nail holes and'burs in the lower'surfaces of said heel portions, an upper'plate l15 havin -projections 16, and a lowerplate'l? havlng a series of projections 18 are provided, these platesbeingradapted to cover the entire upper and. under'surfaces of the plural mold,

v and? are accurately positioned rbydowel pins 19 .and 20 on the .upper and lowerplates respectively, and dowcl holes 21,'and 22 in the plural moldf' I f Y.

' Three dowel pinsv are provided on each plate, two-of which are located at one end and the third beingpositioned centrally the opposite end.-v This arrangement-allows of. both vplates being securely held in posil v .tion at both lends'with relatively long dowel pins which engage vseparate holes. lhe dowel pins are preferably of smaller diameter at their tops than at their bases, whereby 1they will'easily engage the dowel holes, but are sufficiently large at theirv base to secure a tight it whenfully inserted. f

For producing soles and 'heels of lighter weight, I provide a series of removable members,formed Ito t within the heel cavity and sole portion (see Fig. 7). When using these members an interchangeablek bottomy plate can be used, identical with that shown in the drawings, excepting `thatthere are no series 'members.. e.

of' pins thereon. v Any desired corrugations, names, trade marks, vor, .other designation may be imprinted-on thenished soles by having 'suite .ahlen-prepared surfaces on @the .removable From the abovedescription, it, will beA seen -that-a tpractical Agangor -plural `mold is provided or forming'shoe soles from rubber or v 1,136,3e6 Y' tirely through the plate, and .an integral de.

pressed webconnection between and around the several lforms.

2. 'A gang sole mold, comprising a series of soleA forms formedin a single plate, said forms embodying yheel cavities formed yentirelythrough the plate and contour frames,

and an integral depressed web connection between and around the several forms.

' 3,-A gang mold, comprising a. series of ysole 'forms each having a contour frame which is connected tothe adjacent frame by a depressed web,"a peripheral frame of the same height of the contour frames, and bottom and top-plates removably connected to said-,peripheral frame.

4. A gang sole mold, comprisin a series of sole forms formed in ya single p ate, said forms embodying heel cavities formed entirely through the 'plate and depressed sole portions, and an integral depressed web connection between and around the several forms. I

' 5. A gang sole mold,.comprising a series of' sole forms formed in a single plate, said forms embodying heel cavities formed entirely through the plate, a depressed sole portion, `and a shank portion thicker than said sole portion, and an integral ldepressed web connection between and around the sevleral forms.

6.A gang sole mold,comprising a series of sole forms formed with a single plate,

each of saidfforms embodying a heel cavity Vanda depressed sole portion, and an integral depressed web connection between and around the several forms.

7. A gang sole mold, comprising a series vof sole forms formed vwith a single plate, each` of said forms embodying a heel cavity, a. depressed sole portion, and a 'shank portion thicker than the sole portion, and a depressed web connection between and around the several formsandintegral therewith.

8. A gang sole mold, comprising a series 'of sole forms formed with a single plate,

each -of -said forms embodying a heel cavity and a depressed sole portion, a contour ramesurroundin'g each cavity and sole portion, and a depressed web connection -between ands around the several forms and integral therewith.

9. A gang sole y1nold,.compris ing a series. of s ole forms formed with a single plate,

each of said forms embodying a heel cavity and;I a depressed vsole portion, a contour frame surrounding said cavity and sole p01'- tion, a depressed 'web connection'between and around the several forms and integral therewith, and a second frame surrounding and spaced from said contour frames, of equal height therewith,- and integral with said web connection. l

10. A gang sole mold, comprising a series of sole forms formed with a' single plate, each of said forms embodying a heel cavity and a depressed sole portion, a contour frame surrounding said cavity and sole portion, -a depressed web connection between and around the several forms and integral therewith, and means integralwith the depressed web and spaced from said forms for preventing an unequal pressure on said forms.

l1. A. Isole mold, comprising aisole form embodying a heel cavity and a depressed sole portion, a contour frame surrounding 2 0-I 'means, said regulating means, depressed 4 means and contour frame being formed in a single. plate of metal. 3'0

In testimony whereof I hereunto aix my signaturein presence of two Witnesses.

v CHARLES H. HILL.

' Witnesses:

NORAV L. CoNDoN, f CHARLES W.' LovE'rT. 

